Electromagnetic Waves-4
Class 12 Physics Science

MCQ Questions Class 12 Electromagnetic Waves With Answers

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CBSE Class 12 Electromagnetic Waves Multiple Choice Questions with Answers. MCQ Questions Class 12 Electromagnetic Waves with Answers Is Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 12 Electromagnetic Waves MCQs with Answers to know their preparation level.

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Students who are searching for NCERT MCQ Questions for Class 12 Electromagnetic Waves with Answers are compiled here to get good practice on all fundamentals. Know your preparation level on MCQ Questions for Class 12 Electromagnetic Waves with Answers. You can also verify your answers from our provided MCQ Class 12 Electromagnetic Waves with Answers. So, ace up your preparation with MCQ of Class 12 Physics Examinations.

MCQ Questions Class 12 Electromagnetic Waves with Answers - Set - 4

Question 1: 

According to Maxwell’s hypothesis, changing of electric field give rise to : 
(a) magnetic field
(b) pressure gradient
(c) charge
(d) voltage

Correct Answer – (A)

Question 2 : 

Light with an average flux of 20 W/cm2 falls on a non-reflecting surface at normal incidence having surface area 20 cm2. The energy received by the surface during time span of 1 minute is
(a) 10 × 103 J
(b) 12 × 103 J
(c) 24 × 103 J
(d) 48 × 103 J 

Correct Answer – (C)

Question 3 : 

A parallel plate capacitor of capacitance 20 mF is being charged by a voltage source whose potential is changing at the rate of 3 V/s. The conduction current through the connecting wires, and the displacement current through the plates of the capacitor, would be, respectively
(a) zero, zero
(b) zero, 60 mA
(c) 60 mA, 60 mA
(d) 60 mA, zero

Correct Answer – (C)

Question 4 : 

Light Year is the unit of:
(a) distance
(b) time
(c) energy
(d) intensity of light

Correct Answer – (A)

Question 5 : 

Solar radiation is :
(a) transverse EMW
(b) longitudinal EMW
(c) both (a) and (b)
(d) None of these

Correct Answer – (A)

MCQ Questions Class 12 Electromagnetic Waves with Answers

Question 6 : 

The ratio of contributions made by the electric field and magnetic field components to the intensity of an electromagnetic wave is (c = speed of electromagnetic waves)
(a) c : 1
(b) 1 : 1
(c) 1 : c
(d) 1 : c2 

Correct Answer – (B)

Question 7 : 

A 100 W resistance and a capacitor of 100 W reactance are connected in series across a 220 V source. When the capacitor is 50% charged, the peak value of the displacement current is
(a) 2.2 A
(b) 11 A
(c) 4.4 A
(d) 11√2 A

Correct Answer – (A)

Question 8 : 

Electromagnetic wave consists of periodically oscillating electric and magnetic vectors
(a) in mutually perpendicular planes but vibrating with a phase difference of Π
(b) in mutually perpendicular planes but vibrating with a phase difference of Π/2
(c) in randomly oriented planes but vibrating in phase
(d) in mutually perpendicular planes but vibrating in phase

Correct Answer – (D)

Question 9 : 

Ampere’s circuital law was modified by:
(a) Laplace
(b) Gauss
(c) Maxwell
(d) Hertz

Correct Answer – (C)

Question 10 : 

If ue and um arc the electric and magnetic field densities in an electromagnetic wave, then (c is the speed of light):
(a) ue = um
(b) ue = c um
(c) ue = um/c

(d) None of these

Correct Answer – (A)
MCQ Questions Class 12 Electromagnetic Waves with Answers
Set 1
Set 2
Set 3
Set 4
Set 5

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